import { Component } from '@angular/core';

import {Observable} from "rxjs/index"; //Observable
import {fromEvent} from "rxjs/index";  //静态方法
import { map } from "rxjs/operators";  //操作符

@Component({
  selector: 'app-root',
  templateUrl: './app.component.html',
  styleUrls: ['./app.component.css']
})
export class AppComponent {
  title = '我的项目';
  private isShowMore:boolean;
}
